Bluetooth low energy connection state tws earbuds controls

The last link-layer state mentioned is the connected state. The connection state can be entered from the broadcast state or the initiating state. Both cases originate from the initiator sending a connection request message to the broadcaster. www.bjbjaudio.com   <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>   <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>

As already mentioned, the connected state has two sub-states; master or slave. In the connected state, two devices transmit data channel messages to each other. This is also the only state that uses the data channel, all other states use the broadcast channel. A device in the connected state can only transition to the ready state by disconnecting, and cannot enter other states. www.bjbjaudio.com

1. Main connection state
The main connection state can only be entered from the initiator state. In order to become the master device, it must initiate a connection to the peer device. The master device must periodically send messages to the slave device. The slave device can only send its own data by replying to these messages.   <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>
2. From the connected state
From the connection state, you can only enter from the broadcast state. In order to become a slave device, it must broadcast to the peer device. For the slave device, it can only be sent after the message from the master device is correctly received. After receiving a message from the master device, the slave device can send a message of its own. If the slave device wants to send more data, it must wait for the master device to send another message before replying. The slave device can also ignore the master device at any time to save energy. In this way, the slave device can save a lot of energy by "sleeping".
3. Multi-state machine
A concrete implementation of a link layer can have multiple independent state machines. for example. By configuration, a device can act as a slave, broadcaster, and active scanner at the same time; or as a master, broadcaster, passive scanner, or initiator at the same time. A device can also be connected to multiple slave devices as multiple master devices at the same time. It is important to understand some of these limitations. www.bjbjaudio.com      <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>           <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>

Cannot be master and slave at the same time
The link layer is a "dictator", if it becomes a master device, it cannot become a slave device at the same time. Similarly, a slave device cannot be a master device at the same time. This also means that the master device cannot send broadcast messages that can be used to connect. However, it can still send unconnectable broadcasts or discoverable broadcasts. www.bjbjaudio.com

Due to the above limitations, the slave device cannot initiate a connection either, as this would cause it to become the master device. through this restriction. There is no uncertainty about what the device should do at any point in time. The deterministic nature of the Bluetooth low energy link layer allows devices to use efficient scheduling algorithms. Any non-deterministic system that needs to be synchronized in multiple time domains requires very complex scheduling algorithms. These algorithms also require a lot of computing resources due to uncertainty, and thus do not meet the design goals of low power consumption. Deterministic design, on the other hand, can implement efficient algorithms based on discrete logic. www.bjbjaudio.com

A device cannot be a slave device of two master devices at the same time. A slave device cannot broadcast connectable broadcast messages. In fact, being a slave device of two master devices at the same time is a more complicated situation than being a master device and a slave device at the same time. For Classic Bluetooth, this is called a scatternet, which is not supported by Bluetooth Low Energy. www.bjbjaudio.com      <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>            <a style="opacity:0.0;color:#ffffff">tws earbuds controls</a>